Whereas the CS01 is barely more than a synth-historical artefact, the CS33 builds on the concept and is quite a capable little synth even by today's standard. While it can do all sorts of bread and butter sounds, its signature sounds come from the PWM oscillator waveforms, twin linked filter modes and the built-in distortion effects.

Oberon is a classic analog polysynth that works best when you set your VST host program to 96 kHz sample rate. It has two special oscillators, two envelopes and a special 2-pole dualfilter. You might wonder do we need another VA synth (and I might too) but anyway, it's free so why not?

KarBass is a straight forward bass synth, with a Karplus oscillator that brings string like sounds. Smoothing gives you pick to fingered sounds. You can compare this with plugins like the virtual bass in Cubase. Double this with a sub oscillator and saturator to get real heavy sub bass tones.